Cannot access "OK' button on 'Document Properties.'

[SRA]

Tried to set document properties, a new page size. The dialogue box cannot be resized. The 'OK' button off the bottom of the screen, so I can't apply the properties.

[Lazur]

I assume you chose the "resize page to selection" option. If you close that part, the panel will get shorter and the ok button will appear.
(Been there, done that.)

[brynn]

Welcome SRA!

The good news here is that there is no OK or Apply button on Document Properties > Page tab.

But on many screens, even ordinary 14 inch laptop/notebook computers, the entire dialog can't be seen.  Developers are working on a solution already, but I don't know when it will be ready. 

Counter-intuitively, docking the Document Properties dialog will allow you to see the last few options!  Do you know how to dock and undock?  If not, we can explain.  Or http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Anatomy.html#Anatomy-Dock

Fortunately, those last couple of options are probably not needed very often, if at all.  So you can undock after you finish.